Add windowing/virtualization.

[nnaemekaibe]

We should not load all the cards at once. Virtualization library we can use include:

• https://github.com/bvaughn/react-window
• https://github.com/bvaughn/react-virtualized
• https://github.com/bvaughn/react-virtualized-auto-sizer
• https://github.com/bvaughn/react-window-infinite-loader